Know Your Environment. Protect Your Health.

Bromoform

Crofton, City of

Bromoform, one of the total trihalomethanes (TTHMs), is formed when chlorine or other disinfectants are used to treat drinking water. Bromoform and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.

 

24

Samples

0

Samples exceeding legal limit (MCL)

19

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20180.898 ppb440.570 ppb - 1.09 ppb
20190.455 ppb43ND - 0.720 ppb
20201.02 ppb43ND - 1.99 ppb
20210.890 ppb42ND - 2.04 ppb
20221.13 ppb440.640 ppb - 1.52 ppb
20230.803 ppb43ND - 1.47 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.5 ppb

The EWG Health Guideline of 0.5 ppb for bromoform is based on the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer, harm to reproduction and child development, and change to fetal growth and development .

ppb = parts per billion

All test results

Date Lab ID Result
2018-01-085323590.570 ppb
2018-04-095438320.851 ppb
2018-07-095619641.08 ppb
2018-10-105783521.09 ppb
2019-01-075906340.720 ppb
2019-04-09600543ND
2019-07-086224270.520 ppb
2019-10-156382510.580 ppb
2020-01-14651247ND
2020-04-146670560.870 ppb
2020-07-136816851.99 ppb
2020-10-137010721.23 ppb
2021-01-11716875ND
2021-04-12727254ND
2021-07-127464472.04 ppb
2021-10-137656641.52 ppb
2022-01-107809890.640 ppb
2022-04-137938271.05 ppb
2022-07-118126931.52 ppb
2022-10-118300871.30 ppb
2023-01-31841402ND
2023-04-258585180.880 ppb
2023-07-178743781.47 ppb
2023-10-238913850.860 ppb